IBX-6484: Fixed Content Handler loadVersionInfoList database error

For more details see https://issues.ibexa.co/browse/IBX-6484 and #384

Key changes:

* Added check if `$row` is empty to prevent a database error in persistence Content Handler `loadVersionInfoList`.

eZ/Publish/Core/Persistence/Legacy/Content/Handler.php

@@ -911,6 +911,11 @@ static function ($lang) use ($languageCode) {
     public function loadVersionInfoList(array $contentIds): array
     {
         $rows = $this->contentGateway->loadVersionInfoList($contentIds);
+
+        if (empty($rows)) {
+            return [];
+        }
+
         $mappedRows = array_map(
             static function (array $row): array {
                 return [

tests/integration/Core/Repository/ContentService/LoadVersionInfoTest.php

@@ -42,4 +42,18 @@ public function testLoadVersionInfoListByContentInfo(): void
             self::assertEquals($loadedVersionInfo, $versionInfo);
         }
     }
+
+    public function testLoadVersionInfoListByContentInfoForTopLevelNode(): void
+    {
+        $contentService = self::getContentService();
+        $locationService = self::getLocationService();
+
+        $location = $locationService->loadLocation(1);
+
+        $versionInfoList = $contentService->loadVersionInfoListByContentInfo(
+            [$location->getContentInfo()]
+        );
+
+        self::assertCount(0, $versionInfoList);
+    }
 }